How credit-card tsumitate works, monthly limits, reward rates and card fees, eligible funds, and how to calculate the real value.
Credit-card tsumitate lets you fund monthly fund purchases (typically up to ¥100,000/month) with a partner card and earn points, but the value depends heavily on card annual fees and spending conditions — calculate reward minus card cost, and never chase points into the wrong fund.
Several brokers let you pay for monthly recurring fund purchases with a designated partner credit card instead of cash from your bank — this is "credit-card tsumitate." You earn the card’s points on the investment amount, and the purchase can often sit inside NISA at supporting brokers. Monthly amounts are typically capped around ¥100,000.
Major ecosystems include SBI with SMBC/Olive cards, Rakuten Securities with Rakuten Card, Monex with d Card, Mitsubishi UFJ eSmart with MUFG or au PAY cards, and PayPay Securities with PayPay Card. Each pairs a broker with a card program, and the reward structures differ substantially.
Reward rates are where the marketing gets complicated. Published rates range from near zero on some basic cards to materially higher rates on premium cards, and they often depend on conditions such as annual non-investment spending on the card, the card tier, or first-year promotions. Reported examples include roughly 0.5% on standard cards, higher rates (up to around 1–2% or more) on premium cards, and eye-catching first-year or campaign rates that are not the ongoing rate.
Separate the recurring rate from temporary or first-year bonuses, and always subtract the card’s annual fee. Treat the advertised maximum as conditional marketing, not the rate you will actually earn month after month.
Do the arithmetic before committing. A 1% reward on ¥100,000 a month is ¥12,000 a year. Paying a ¥33,000 annual card fee purely to obtain that reward is irrational unless the card’s other benefits provide at least another ¥21,000 of genuine value you would use anyway. The rule: calculate reward minus annual card fee minus any incremental spending you would not otherwise do.
And never let points determine the investment. Points are a small rebate on fees, not a reason to buy a worse fund or a fund that does not fit your plan. Choose the account, allocation, and fund first; then, if a card you already value happens to offer a good tsumitate rate, treat the points as a modest bonus.
Brokerage (NISA/iDeCo) · Rakuten Securities
A leading low-cost brokerage for NISA and index-fund investing, integrated with Rakuten points and Rakuten Bank.
Fees: Many domestic funds and trades are low- or no-commission — verify current fee schedule.
Brokerage (NISA/iDeCo) · SBI Securities
Japan’s largest online brokerage by accounts, with a very broad low-cost fund lineup and full NISA/iDeCo support.
Fees: Many trades and funds are low- or no-commission — verify current fee schedule.
Brokerage (NISA/iDeCo) · Monex
An established online brokerage often chosen for US-stock access and research tools, with NISA and iDeCo support.
Fees: Commissions vary by product; some funds/trades are low-cost — verify current schedule.
This is education, not a recommendation. Most beginners research low-cost, broadly diversified index funds — for example all-country (全世界株式) or S&P 500 trackers — rather than picking individual stocks, because low fees and diversification are within your control while returns are not. Understand that values fall as well as rise, match the risk to your time horizon, and never invest money you may need soon.